package com.glela.api.logistics.juhe;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

import org.apache.log4j.Logger;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.glela.api.logistics.juhe.vo.JuHeApiVo;
import com.glela.api.logistics.util.LogisticsConfig;

/**
 * 常用快递调用示例代码 － 聚合数据 在线接口文档：http://www.juhe.cn/docs/43
 **/

public class JuheApi {
	
	private static final Logger logger = Logger.getLogger(JuheApi.class);
			
	public static final String DEF_CHATSET = "UTF-8";
	public static final int DEF_CONN_TIMEOUT = 30000;
	public static final int DEF_READ_TIMEOUT = 30000;
	public static String userAgent = "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";

	// 配置您申请的KEY
	//public static final String APPKEY = "7bcb8470d9a6830faf61e622caff39a1";

	/**
	 * 常用快递查询API
	 * 
	 * @param com
	 *            快递公司编号
	 * @param no
	 *            快递号
	 * @return
	 */
	public static JuHeApiVo getExp(String com, String no) {
		String result = null;
		String url = LogisticsConfig.urlBase+"index";// 请求接口地址
		Map<String, Object> params = new HashMap<String, Object>();// 请求参数
		params.put("com", com);// 需要查询的快递公司编号
		params.put("no", no);// 需要查询的订单号
		params.put("key", LogisticsConfig.appKey);// 应用APPKEY(应用详细页查询)
		params.put("dtype", "");// 返回数据的格式,xml或json，默认json
		JuHeApiVo juhe = new JuHeApiVo();
		try {
			result = net(url, params, "POST");
			JSONObject object = JSON.parseObject(result);
		
			if (object.getIntValue("error_code") == 0) {
				juhe = JSONObject.parseObject(object.get("result").toString(), JuHeApiVo.class);
			}
			if(object.getIntValue("error_code") > 0) {
				throw new Exception("查询快递错误:" + object.get("reason").toString());
			}
		} catch (Exception e) {
			logger.error(e.getMessage(),e);
		}
		return juhe;
	}

	/**
	 * 快递公司编号对照表
	 * 
	 * @return
	 */
	public static String getCourierNo() {
		String result = null;
		String url = LogisticsConfig.urlBase+"com";// 请求接口地址
		Map<String, Object> params = new HashMap<String, Object>();// 请求参数
		params.put("key", LogisticsConfig.appKey);// 应用APPKEY(应用详细页查询)
		try {
			result = net(url, params, "POST");
		} catch (Exception e) {
			logger.error(e.getMessage(),e);
		}
		return result;
	}

	/**
	 *
	 * @param strUrl
	 *            请求地址
	 * @param params
	 *            请求参数
	 * @param method
	 *            请求方法
	 * @return 网络请求字符串
	 * @throws Exception
	 */
	public static String net(String strUrl, Map<String, Object> params, String method) throws Exception {
		HttpURLConnection conn = null;
		BufferedReader reader = null;
		String rs = null;
		try {
			StringBuffer sb = new StringBuffer();
			if (method == null || method.equals("GET")) {
				strUrl = strUrl + "?" + urlencode(params);
			}
			URL url = new URL(strUrl);
			conn = (HttpURLConnection) url.openConnection();
			if (method == null || method.equals("GET")) {
				conn.setRequestMethod("GET");
			} else {
				conn.setRequestMethod("POST");
				conn.setDoOutput(true);
			}
			conn.setRequestProperty("User-agent", userAgent);
			conn.setUseCaches(false);
			conn.setConnectTimeout(DEF_CONN_TIMEOUT);
			conn.setReadTimeout(DEF_READ_TIMEOUT);
			conn.setInstanceFollowRedirects(false);
			conn.connect();
			if (params != null && method.equals("POST")) {
				try {
					DataOutputStream out = new DataOutputStream(conn.getOutputStream());
					out.writeBytes(urlencode(params));
				} catch (Exception e) {
					// TODO: handle exception
				}
			}
			InputStream is = conn.getInputStream();
			reader = new BufferedReader(new InputStreamReader(is, DEF_CHATSET));
			String strRead = null;
			while ((strRead = reader.readLine()) != null) {
				sb.append(strRead);
			}
			rs = sb.toString();
		} catch (IOException e) {
			logger.error(e.getMessage(),e);
		} finally {
			if (reader != null) {
				reader.close();
			}
			if (conn != null) {
				conn.disconnect();
			}
		}
		return rs;
	}

	// 将map型转为请求参数型
	private static String urlencode(Map<String, Object> data) {
		StringBuilder sb = new StringBuilder();
		for (Map.Entry<String, Object> i : data.entrySet()) {
			try {
				sb.append(i.getKey()).append("=").append(URLEncoder.encode(i.getValue() + "", "UTF-8")).append("&");
			} catch (UnsupportedEncodingException e) {
				logger.error(e.getMessage(),e);
			}
		}
		return sb.toString();
	}
}